Question

(x – 3)ngũ 2 = 16

Answer 1

x-3= 4

x=7

Answer 2

\(\left(x-3\right)^2=16\)

\(\Rightarrow\left[{}\begin{matrix}x-3=16\\x-3=-16\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}x=19\\x=-13\end{matrix}\right.\)

Vậy: \(x\in\left\{19;-13\right\}\)

Answer 3

\(\Leftrightarrow\left[{}\begin{matrix}x-3=4\\x-3=-4\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=7\\x=-1\end{matrix}\right.\)

Answer 4

\(\left(x-3\right)^2=16\\ \Rightarrow\left[{}\begin{matrix}x-3=-4\\x-3=4\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=-1\\x=7\end{matrix}\right.\)